A bearing testing device

Abstract

The application discloses a bearing testing device in the field of bearing testing, which comprises, from top to bottom, a motor seat assembly, an upper beam assembly, an upper bearing assembly, a lower bearing assembly, a loading assembly and a lower beam; the motor seat assembly is fixedly connected with the upper beam assembly and drives the rotation of a main shaft in the upper beam assembly; guide columns pass through the lower beam, the lower bearing assembly and the upper bearing assembly, and the upper and lower ends of the guide columns are fixed on the upper beam assembly and the lower beam respectively; the upper bearing assembly comprises an upper sample, a moving block, an upper bearing seat fixed on the bottom surface of the upper beam assembly and an upper sample seat fixed on the bottom of the upper bearing seat; the main shaft passes through the upper bearing seat and the upper sample seat; the moving block is fixed on the shaft end of the main shaft; and the upper sample is placed between the moving block and the upper sample seat; the application is suitable for evaluating the friction-reducing and wear-resistant properties and comprehensive use performance of self-lubricating bearing materials, surface thin layers or layered composite materials and solid lubricating materials.

Description

Technical Field

[0001] This invention relates to the field of bearing testing, specifically a bearing testing device. Background Technology

[0002] Under ideal conditions, when the load and speed are moderate and lubrication and sealing are good, bearings will not experience significant wear affecting their performance even after long-term operation. However, in practical applications, after a period of operation, bearings exhibit varying degrees of wear at the points of contact or friction with other parts, affecting their stability and service life. Therefore, testing the service life and frictional performance of bearings under different factors is essential. Summary of the Invention

[0003] The purpose of this invention is to provide a bearing testing device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a bearing testing device, comprising, from top to bottom, a motor base assembly, an upper beam assembly, an upper bearing assembly, a lower bearing assembly, a loading assembly, and a lower beam; the motor base assembly is fixedly connected to the upper beam assembly, driving the rotation of the main shaft in the upper beam assembly; guide posts pass through the lower beam, the lower bearing assembly, and the upper bearing assembly, with the upper and lower ends of the guide posts respectively fixed to the upper beam assembly and the lower beam; the upper bearing assembly includes an upper sample, a moving block, an upper bearing seat fixed to the bottom surface of the upper beam assembly, and an upper sample seat fixed to the bottom of the upper bearing seat; the main shaft passes through the upper bearing seat and the upper sample seat; the moving block is fixed to the shaft end of the main shaft; and the upper sample is placed between the moving block and the upper sample seat.

[0005] The loading assembly is fixed above the lower beam. The lower bearing assembly includes a lower sample holder, the top of which is fixed to the lower sample. The moving block is driven to rotate by the main shaft. The lower sample holder slides along the guide post under the loading force provided by the loading assembly. The moving block contacts the end faces of the upper and lower samples respectively to form a sliding friction pair. A temperature sensor is installed on one side of the lower sample. The lower bearing assembly also includes a pressure sensor for detecting the loading force and a friction sensor for detecting the friction force.

[0006] In some embodiments, the loading assembly includes a screw jack, a reducer, a loading spring seat, and a loading spring. The screw jack is fixed to the lower beam, the reducer is connected to the screw jack, the loading spring seat is installed at the lifting end of the screw jack, a loading column is provided inside the loading spring seat, and a loading spring is wound around the outside of the loading column.

[0007] In some embodiments, the lower bearing assembly further includes a moving beam, an axial bearing seat, a spherical bearing seat, a support sleeve, and a lower bearing base. The guide post passes through the moving beam, the bottom of the moving beam has a groove that mates with the loading spring seat, and the top of the moving beam is fixed to the pressure sensor. The axial bearing seat is fixed above the pressure sensor. The spherical bearing seat is installed above the axial bearing seat, and its inner diameter mates with the outer diameter of the axial bearing seat. The outer side of the spherical bearing seat is also connected to the support sleeve. The lower bearing base is threaded to the cylinder and also mates with the spherical bearing in the spherical bearing seat. The lower sample holder is fixed on the lower bearing base.

[0008] In some embodiments, a temperature sensor is installed on one side of the lower sample, and the temperature sensor is mounted on the cylinder; the friction sensor is mounted on a sensor bracket, the sensor bracket is mounted on a moving beam, and the friction sensor is horizontally connected to the cylinder via a tension rod.

[0009] In some embodiments, the upper beam assembly includes an upper beam and a motor positioning block, the guide post passes through the upper beam and is fixed thereto, the main shaft passes through the upper beam from top to bottom, the motor positioning block is fixed to the upper side of the upper beam, and a bearing seat cover is fixed to the lower side of the upper beam.

[0010] In some embodiments, the motor mount assembly includes a motor mount, a main motor, and a coupling. The main motor is fixed on the motor mount, and the output shaft of the main motor is connected to the main shaft via the coupling.

[0011] Beneficial Effects: This invention is used to test bearing performance, such as service life and stability, under high-speed and high-load conditions. It features high load capacity, high speed, and reliable test results. The moving block specimen is fixed to the end face of the spindle and rotates with the spindle; the stationary block specimen is a thrust bearing or other bearing capable of axial force. The moving and stationary block specimens form an end-face contact sliding friction pair. The friction and wear performance of the specimens is tested under oil lubrication or oil-free lubrication conditions. This invention is suitable for evaluating the friction-reducing and wear-resistant properties and overall performance of self-lubricating bearing materials, surface thin-layer or layered composite materials, and solid lubricating materials. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0013] Figure 2 This is a partial structural cross-sectional view of the lower beam assembly of the present invention;

[0014] Figure 3 This is a partial structural cross-sectional view of the loading component of the present invention;

[0015] Figure 4 This is a partial structural cross-sectional view of the lower bearing assembly of the present invention;

[0016] Figure 5 This is a partial structural cross-sectional view of the upper bearing assembly of the present invention;

[0017] Figure 6 This is a partial structural cross-sectional view of the upper beam assembly of the present invention;

[0018] Figure 7 This is a partial structural cross-sectional view of the motor mount assembly of the present invention.

[0019] Numbering on the map:

[0020] 1. Lower beam;

[0021] 2. Loading components; 2-1. Screw jack; 2-2. Reducer; 2-3. Loading spring seat; 2-4. Loading spring;

[0022] 3. Guide post;

[0023] 4. Lower bearing assembly; 4-1. Moving beam; 4-2. Pressure sensor; 4-3. Axial bearing housing; 4-4. Spherical bearing housing; 4-5. Support sleeve; 4-6. Lower bearing base; 4-7. Cylinder; 4-8. Lower sample holder; 4-9. Lower sample; 4-10. Temperature sensor; 4-11. Sensor bracket; 4-12. Friction sensor; 4-13. Tension rod;

[0024] 5. Upper bearing assembly; 5-1. Moving block; 5-2. Upper sample; 5-3. Upper sample holder; 5-4. Upper bearing housing;

[0025] 6. Upper beam assembly; 6-1. Main shaft; 6-2. Bearing housing cover; 6-3. Upper beam; 6-4. Motor positioning block;

[0026] 7. Motor mount assembly; 7-1. Coupling; 7-2. Motor mount; 7-3. Main motor. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] See Figure 1A bearing testing device includes, from top to bottom, a motor base assembly 7, an upper beam assembly 6, an upper bearing assembly 5, a lower bearing assembly 4, a loading assembly 2, and a lower beam 1. Guide posts 3 pass through the lower beam 1, the lower bearing assembly 4, and the upper bearing assembly 5. The upper and lower ends of the guide posts 3 are respectively fixed to the upper beam assembly 6 and the lower beam 1 by bolts. There are generally four guide posts 3, which are symmetrically arranged to connect the upper and lower components and to provide guidance for the up and down movement of the lower bearing assembly 4.

[0029] like Figure 2 As shown, the lower beam 1 is fixed to the ground with bolts, serving as a support.

[0030] Loading component 2 is fixed above the lower beam 1 and is mainly used to provide an upward loading force to the lower bearing assembly 4. For example... Figure 3 As shown, the loading assembly 2 includes a screw jack 2-1, a reducer 2-2, a loading spring seat 2-3, and a loading spring 2-4. The screw jack 2-1 is fixed to the lower beam 1 with screws. The reducer 2-2 is connected to the screw jack 2-1 and drives the screw jack 2-1 to operate. The loading spring seat 2-3 is installed at the lifting end of the screw jack 2-1. A loading column is set inside the loading spring seat 2-3, and a cover plate is fixed to the top. The cover plate has a hole for the loading column to pass through. The loading spring 2-4 is wound around the outside of the loading column and is located inside the loading spring seat 2-3.

[0031] like Figure 4 As shown, the lower bearing assembly 4 includes a moving beam 4-1, an axial bearing seat 4-3, a spherical bearing seat 4-4, a support sleeve 4-5, and a lower bearing base 4-6. A guide post 3 passes through the moving beam 4-1. The bottom of the moving beam 4-1 has a slot for connection with the loading spring seat 2-3 and is also fixed to the cover plate with bolts. The screw jack 2-1 is connected to the moving beam 4-1 via the loading spring seat 2-3. The loading spring seat 2-3 provides protection in case of continuous loading due to a loading device malfunction. The loading post can extend into the slot at the bottom of the moving beam 4-1. The loading spring 2-4 has compressible space, allowing for a flexible connection between the lower bearing assembly 4 and the loading assembly 2.

[0032] A pressure sensor 4-2 is fixed to the top of the moving beam 4-1 to detect the loading force provided by the loading assembly 2, i.e., the applied load. An axial bearing housing 4-3 is fixed above the pressure sensor 4-2. An axial bearing, such as a thrust bearing, is installed inside the axial bearing housing 4-3, primarily to bear the axial load. A spherical bearing housing 4-4 ​​is installed above the axial bearing housing 4-3, and its inner diameter matches the outer diameter of the axial bearing housing 4-3. Because the spherical bearing inside the spherical bearing housing 4-4 ​​is spherical, it ensures that the loading force is perpendicular to the stationary block-shaped lower sample 4-9, ensuring complete contact between the friction surfaces of the upper and lower samples. A support sleeve 4-5 is threaded onto the outer side of the spherical bearing housing 4-4. The support sleeve 4-5 is mainly used to prevent excessive tilting of the spherical bearing, which could cause the cylinder to fall. The lower bearing base 4-6 is bolted to the bottom of the cylinder 4-7, and the lower bearing base 4-6 also mates with the spherical bearing.

[0033] The lower sample holder 4-8 is fixed on the lower bearing base 4-6, and the lower sample 4-9 is fixed to the top surface of the lower sample holder 4-8 by a round pin. A temperature sensor 4-10 is inserted into the side of the lower sample 4-9. The temperature sensor 4-10 is bent into a strip shape and fixed along the inner wall of the cylinder 4-7, used to detect the test temperature of the lower sample 4-9. The friction force sensor bracket 4-11 is fixed on the moving beam 4-1 and tangent to the cylinder 4-7. The tension rod 4-13 is horizontally fixed on the side of the cylinder 4-7. The friction force sensor 4-12 is fixed on the sensor bracket 4-11 and connected to the tension rod 4-13, used to measure the friction force during the test.

[0034] like Figure 5 As shown, the upper bearing assembly 5 includes an upper sample 5-2, a moving block 5-1, an upper bearing seat 5-4 fixed to the bottom surface of the upper beam assembly 6, and an upper sample seat 5-3 fixed to the bottom of the upper bearing seat 5-4. The main shaft 6-1 passes through the upper bearing seat 5-4 and the upper sample seat 5-3. The moving block 5-1 is fixed to the shaft end of the main shaft 6-1. The upper sample 5-2 is placed on the upper surface of the moving block 5-1 and is located in the gap between the moving block 5-1 and the upper sample seat 5-3.

[0035] When the main shaft 6-1 rotates via the motor base assembly 7, the moving block 5-1 rotates accordingly. Under the loading force provided by the loading assembly 2, the lower sample holder 4-8 moves upward along the guide post 3. The moving block 5-1 contacts the end faces of the upper sample 5-2 and the lower sample 4-9 respectively, forming a sliding friction pair. The frictional force causes the cylinder 4-7 to rotate, which is then acted on the friction sensor 4-12 via the tension rod 4-13 installed on the side of the cylinder 4-7. The friction sensor 4-12 thus detects the magnitude of the frictional force.

[0036] In some embodiments, the cylinder 4-7 can be made of stainless steel, which has good rust prevention and is inexpensive. When performing oil lubrication friction tests, lubricating oil is applied to the cylinder 4-7, and both the upper and lower samples are fully immersed in the lubricating oil.

[0037] like Figure 6 As shown, the upper beam assembly 6 includes an upper beam 6-3, a motor positioning block 6-4, and a guide post 3 that passes through and is fixed to the upper beam 6-3. The main shaft 6-1 passes through the upper beam 6-3 from top to bottom. A bearing seat cover 6-2 is fixed to the lower side of the upper beam 6-3 by screws.

[0038] The structure of motor mount assembly 7 is as follows Figure 7 As shown, it includes a motor base 7-2, a main motor 7-3, and a coupling 7-1. The main motor 7-3 is fixed on the motor base 7-2, and the output shaft of the main motor 7-3 is connected to the main shaft 6-1 through the coupling 7-1.

[0039] The loading assembly 2 is driven by a motor via a reducer 2-2, which in turn drives a screw jack 2-1 to provide an upward loading force. This force causes the lower bearing assembly 4 to move up and down. The moving beam 4-1 in the lower bearing assembly 4 slides up and down via guide posts 3, eventually bringing the lower sample 4-9 into contact with the moving block 5-1. Simultaneously, the main shaft 6-1 is driven to rotate by the main motor 7-3. The main shaft 6-1 drives the moving block 5-1 to rotate, and the moving block 5-1 rubs against the end faces of the upper and lower samples, forming a friction pair. The frictional force generated between the moving block 5-1 and the upper sample 5-2 and the lower sample 4-9 is detected by the friction sensor 4-12.

[0040] The moving block 5-1 can be used for friction tests without lubricating oil circulation, or an external oil tank can be installed on the moving beam 4-1 to provide circulated test lubricating oil for friction tests. Alternatively, a heating / cooling device can be installed inside the oil tank to heat / cool the test oil in the test oil box without lubricating oil circulation, thus increasing the detection of factors affecting friction performance.

[0041] This testing machine can change the upward displacement of the lower bearing assembly 4 by loading component 2 to control the load borne by the moving block during friction. It can test the friction performance of the sample by changing the rotation speed and time of the motor base assembly 7, and test the friction performance of the sample by changing the temperature and lubrication state of the lubricating oil. Furthermore, it can also change the material, roughness, hardness and other parameters of the upper and lower samples to examine the changes in the friction and wear performance of the test material under various influencing factors. Based on the changes in test parameters under different conditions and the wear condition of the sample surface, it can evaluate the tribological characteristics and comprehensive performance of the sample material under dry friction or oil lubrication conditions.

[0042] In this invention, two sets of back-to-back angular contact ball bearings are installed between the lower part of the spindle and the upper beam 6-3, and one set of back-to-back angular contact ball bearings is installed between the upper part and the upper beam 6-3. This enables high-load, high-speed rotation without significant temperature rise (maximum speed 5000 r / min). Experimental data are accurately measured using various sensors such as pressure sensors, friction sensors, and temperature sensors in conjunction with a speed display. The main motor can operate in a continuous loading, stepless speed regulation mode. The test parameters such as load, speed, friction torque, friction coefficient, friction surface temperature, test oil tank temperature, and spindle box temperature are detected, collected, and analyzed in real time using control instruments, a computer, and dedicated test data processing software. The statistical test results are presented in the form of data charts (or printed out).

[0043] This invention is used to test bearing performance, such as service life and stability, under high-speed and high-load conditions. It features high load capacity, high speed, and reliable test results, making it suitable for testing bearings capable of axial stress. The moving block sample is fixed to the end face of the spindle and rotates with it. The upper and lower samples are thrust bearings or other bearings capable of axial stress. The moving block and the upper and lower samples form an end-face contact sliding friction pair. The friction and wear performance of the samples is tested under oil lubrication or oil-free lubrication conditions. The testing machine provided by this invention is suitable for evaluating the friction-reducing and wear-resistant properties and overall performance of self-lubricating bearing materials, thin-layer or layered composite materials, and solid lubricating materials.

[0044] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0045] Therefore, the above description is only a preferred embodiment of this application and is not intended to limit the scope of this application; that is, all equivalent modifications made in accordance with the scope of the claims of this application shall be within the protection scope of the claims of this application.

Claims

1. A bearing testing device, characterized in that, From top to bottom, the assembly includes a motor base assembly (7), an upper beam assembly (6), an upper bearing assembly (5), a lower bearing assembly (4), a loading assembly (2), and a lower beam (1). The motor base assembly (7) is fixedly connected to the upper beam assembly (6) to drive the rotation of the main shaft (6-1) in the upper beam assembly (6). Guide posts (3) pass through the lower beam (1), the lower bearing assembly (4), and the upper bearing assembly (5), and the upper and lower ends of the guide posts (3) are fixed to the upper beam assembly (6) and the lower beam (1), respectively. The upper bearing assembly (5) includes an upper sample (5-2), a moving block (5-1), an upper bearing seat (5-4) fixed to the bottom surface of the upper beam assembly (6), and an upper sample seat (5-3) fixed to the bottom of the upper bearing seat (5-4). The main shaft (6-1) passes through the upper bearing seat (5-4) and the upper sample seat (5-3). The moving block (5-1) is fixed to the shaft end of the main shaft (6-1). The upper sample (5-2) is placed between the moving block (5-1) and the upper sample seat (5-3). The loading assembly (2) is fixed above the lower beam (1). The lower bearing assembly (4) includes a lower sample holder (4-8). The lower sample (4-9) is fixed at the top of the lower sample holder (4-8). The moving block (5-1) is driven to rotate by the main shaft (6-1). The lower sample holder (4-8) slides along the guide post (3) under the loading force provided by the loading assembly (2). The moving block (5-1) contacts the end faces of the upper sample (5-2) and the lower sample (4-9) respectively to form a sliding friction pair. A temperature sensor (4-10) is installed on one side of the lower sample (4-9). The lower bearing assembly (4) also includes a pressure sensor for detecting the loading force. The sensor (4-2) and the friction sensor (4-12) for detecting friction force; the loading assembly (2) includes a screw jack (2-1), a reducer (2-2), a loading spring seat (2-3), and a loading spring (2-4). The screw jack (2-1) is fixed on the lower beam (1), the reducer (2-2) is connected to the screw jack (2-1), the loading spring seat (2-3) is installed at the lifting end of the screw jack (2-1), a loading column is provided inside the loading spring seat (2-3), and a loading spring (2-4) is wound around the outside of the loading column; the lower bearing assembly (4) also includes a moving beam (4- 1) Axial bearing seat (4-3), spherical bearing seat (4-4), support sleeve (4-5), lower bearing base (4-6). The guide post (3) passes through the moving beam (4-1). The bottom of the moving beam (4-1) is provided with a groove that mates with the loading spring seat (2-3), and the top is fixed with the pressure sensor (4-2). The axial bearing seat (4-3) is fixed above the pressure sensor (4-2). The spherical bearing seat (4-4) is installed above the axial bearing seat (4-3), and its inner diameter mates with the outer diameter of the axial bearing seat (4-3). The outer side of the spherical bearing seat (4-4) is also connected with the support sleeve (4-5). The lower bearing base (4-6) is threaded to the cylinder (4-7) and also cooperates with the spherical bearing in the spherical bearing seat (4-4). The lower sample holder (4-8) is fixed on the lower bearing base (4-6). A temperature sensor (4-10) is installed on one side of the lower sample (4-9). The temperature sensor (4-10) is installed on the cylinder (4-7). The friction sensor (4-12) is installed on the sensor bracket (4-11). The sensor bracket (4-11) is installed on the moving beam (4-1). The friction sensor (4-12) is horizontally connected to the cylinder (4-7) through the tension rod (4-13).

2. The bearing testing device according to claim 1, characterized in that, The upper beam assembly (6) includes an upper beam (6-3) and a motor positioning block (6-4). The guide post (3) passes through the upper beam (6-3) and is fixed thereto. The main shaft (6-1) passes through the upper beam (6-3) from top to bottom. The motor positioning block (6-4) is fixed on the upper side of the upper beam (6-3), and the bearing seat cover (6-2) is fixed on the lower side of the upper beam (6-3).

3. The bearing testing device according to claim 1, characterized in that, The motor mount assembly (7) includes a motor mount (7-2), a main motor (7-3), and a coupling (7-1). The main motor (7-3) is fixed on the motor mount (7-2), and the output shaft of the main motor (7-3) is connected to the main shaft (6-1) through the coupling (7-1).

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